WO2011057518A1

WO2011057518A1 - Method for tandem connection monitor level processing and apparatus thereof

Info

Publication number: WO2011057518A1
Application number: PCT/CN2010/076790
Authority: WO
Inventors: 年庆飞
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-11-13
Filing date: 2010-09-10
Publication date: 2011-05-19
Also published as: EP2487835A4; CN102064881A; EP2487835B1; EP2487835A1; CN102064881B; US20120219284A1

Abstract

The present invention discloses a method for tandem connection monitor (TCM) level processing, which includes: obtaining the routes of services which need to be configured TCM, obtaining the TCM segments on the obtained routes of the services, determining the TCM segments which need to be configured among the obtainded TCM segments, according to the segment relations between the TCM segments which need to be configured and the TCM segments which have been configured allocating TCM levels for the TCM segments which need to be configured. The present invention also discloses an apparatus for TCM level processing simultaneous. By adopting the present invention, the TCM levels can be allocated to the TCM segments automatically, and the present invention also can be applied in various network application environments.

Description

Method and device for processing series connection monitoring level

The present invention relates to a series connection monitoring technique in an optical communication network, and more particularly to a series connection monitoring level processing method and apparatus. Background technique

At present, the optical transport network (OTN) is the trend of the transport network to the all-optical network. The 0TN is a series of international telecommunication alliance telecommunication standardization organizations such as G.872, G.709, and G.798 (ITU- T, ITU Telecommunication Standardization Sector) A new generation of digital transmission systems and optical transmission systems are proposed. Among them, ITU-T G.709 describes the related functions of TCM (Tam, Connection Demonstration Monitoring).

From the frame structure and overhead of the OTN, the frame structure of the OTN is mainly divided into an Optical Transform Unit (OUT), an Optical Data Unit (ODU), and an Optical Payload Unit (OPU). Three floors. Six levels of TCM overhead (OH, OverHead) are defined in the ODU layer. Each TCM includes: a path tracking identifier (TTI) for monitoring the sublayer, a bit interleaved parity (BIP-8) of length 8, and thereafter. Continuous defect monitoring (BDI), backward error indication (BEI), status field (STAT) to identify whether the current signal is a maintenance signal, backward access positioning error (BIAE), etc. Connectivity monitoring, signal quality monitoring.

The application of TCM is mainly manifested in two aspects: maintenance signal monitoring and sub-layer network level protection. Multi-level TCM is one of the characteristics of OTN network, which can greatly increase the monitoring capability of service segmentation. Specifically, the six-level TCM can be implemented in an inclusive, overlapping, and concatenated manner, so that the ODUk connection can achieve monitoring of any segment when spanning multiple optical networks or management domains. such as, A service may span multiple subnets or multiple carriers. In this case, TCM monitoring can be set on the network segment of each subnet or each operator-managed zone. This TCM monitoring is isolated from each other due to different levels. This feature of OTN enables performance monitoring of each segment on a path, improving the ability to manage the network.

In the prior art, the monitoring level of the TCM is generally specified by the network management system user. This method can be implemented only when the network size is small and the networking environment is relatively simple. However, with the increase of the network scale, in the case where the monitoring network segment is increased and the relationship between the monitoring network segments is complicated, the manual designation method is very prone to problems.

In order to solve the problem of the manual designation, the technology also proposes a method for automatically allocating the TCM, specifically: configuring the scope of the domain or domain in the network to be monitored by using the TCM, determining the ODU service to be monitored by the TCM, and then according to the ODU service. The path and configured domain automatically perform TCM assignment, enabling or disabling TCM for each level. However, existing methods have certain disadvantages:

1) The actual service networking environment is not considered, and it is not suitable for network applications in the actual environment. For example, the services in the actual networking are generally protected. For the insertion of the serial connection monitoring, both the work service and the work are considered. Consider the protection of the service, including the protection of the route; if in the Automatically Switched Optical Network (ASON) environment, the preset recovery route should also be considered.

2) Starting from the segmentation angle and the analysis segment relationship, the TCM level is calculated only from the subnet or domain division, which reduces the flexibility of TCM level management, cannot generate TCM segments according to the existing configuration, and cannot process non-domains. In the case of a multi-level network management system, if the lower-layer NMS does not divide the TCM segment by domain, the existing technology cannot automatically generate TCM segments. Summary of the invention

In view of this, the main object of the present invention is to provide a serial connection monitoring level processing method and apparatus, which can automatically allocate TCM levels for TCM segments, and can be applied to multiple network applications. in environment.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

The present invention provides a TCM level processing method, including:

Obtain the route to be configured with the TCM service, obtain the TCM segment on the service route, determine the TCM segment to be configured in the obtained TCM segment, and configure the segment relationship between the TCM segment and the configured TCM segment as required. The TCM segment is assigned a TCM level.

The route for obtaining the service to be configured with the TCM is specifically: specifying the name of the service to be configured with the TCM; and querying the routing information of the service according to the specified service name.

After the TCM segment on the service route is obtained, the TCM segment to be configured is determined. The method further includes: automatically generating the TCM according to the TCM configuration of the existing service when there is a TCM segment that is not obtained but has TCM configuration data. The TCM segment between the insertion point and the monitoring point.

In the foregoing solution, the TCM level is allocated for the TCM segment to be configured, including: first assigning a level to a TCM segment that does not include or overlap other segments according to the TCM level order, and then including or overlapping other segments, and the other segments are allocated TCM. The TCM segment of the level is assigned the TCM level until all TCM segments are assigned the TCM level.

In the foregoing solution, before the TCM level is configured for the TCM segment to be configured, the method further includes: calculating an available TCM level according to the existing TCM configuration of the service; correspondingly, the TCM level is allocated for the TCM segment to be configured. Including: Assign the calculated available TCM level to the TCM segment to be configured.

In the foregoing solution, after the TCM level is allocated for the TCM segment to be configured, the method further includes: recording an assignable range of each TCM segment.

The method further includes: determining that the TCM segment that exists in both the working route and the protection route exists at the intersection of the TCM level assignable range, and adjusts the TCM level allocated to the corresponding TCM segment. In the foregoing solution, the service route is a work route, a protection route, and a preset recovery route. The segment relationship is segment inclusion, segment overlap, segment connection, and segment separation.

The present invention also provides a TCM level processing apparatus, including: a service route acquisition module, a TCM segment determination module, and a TCM level allocation module;

The service route obtaining module is configured to obtain a route for configuring a service of the TCM; the TCM segment determining module is configured to obtain a TCM segment on the service route, and determine a TCM segment to be configured in the obtained TCM segment;

The TCM level allocation module is configured to allocate a TCM level for the TCM segment to be configured according to a segment relationship between the TCM segment to be configured and the configured TCM segment.

Wherein, the device further comprises a storage module for recording an assignable range of each TCM segment. The device further includes a determining module, configured to determine whether all routes are processed; and determining whether a protection route exists.

In the above solution, the device further includes a TCM level adjustment module, which is configured to adjust the TCM level of the corresponding TCM segment according to the intersection of the working route TCM level allocation range and the protection route TCM level allocation range when the service has a working route and a protection route. Distribution range.

The method and device for processing the serial connection monitoring level provided by the present invention obtains the route of the service to be configured with the TCM, obtains the TCM segment on the service route, and determines the TCM segment to be configured with the TCM level in the obtained TCM segment, according to the TCM to be configured. The segment relationship between the segment and the configured TCM segment is assigned a TCM level for the TCM segment to be configured. In this way, both the TCM level assignment of the specified TCM segment and the TCM level assignment of all TCM segments can be achieved.

The method of the present invention does not need to configure a subnet or a TCM configuration domain, and can process the TCM level allocation of the service with the protection route or the preset recovery route. Therefore, the present invention is applicable to various practical networking environments, and the adaptability is more. Strong, more widely used.

When the TCM is monitored, the TCM segment to be configured may be determined based on the service route, and the TCM segment to be configured with the TCM segment is configured according to the relationship between the TCM segment and the configured TCM segment. The TCM level of the segment can reduce the difficulty of network maintenance and reduce the occurrence of faults when the complex networking or TCM monitoring segment relationship is complicated. DRAWINGS

1 is a schematic diagram of relationships between various TCM segments of a service according to an embodiment of the present invention;

2 is a schematic diagram showing an implementation flow of a TCM level processing method according to the present invention;

3 is a schematic flowchart of an implementation process of a TCM level processing method according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of the implementation principle of the TCM level management in the case where the service is not protected according to the present invention; FIG. 5 is a schematic diagram of the implementation principle of the TCM level management in the case where the service is protected. detailed description

The basic idea of the present invention is: obtaining a route of a service to be configured with a TCM, and acquiring a TCM segment on the service route; determining a TCM segment to be configured in the obtained TCM segment, and configuring the TCM segment to be configured between the TCM segment and the configured TCM segment. The segment relationship is to allocate a TCM level to the TCM segment to be configured. The routing of the service includes: a working route and a protection route. When the ASON network is used, the preset recovery route is also included.

The TCM segment refers to a TCM monitoring segment between two service nodes in a service to be configured with a TCM, including a starting point and an ending point. The configured TCM segment is a configured TCM segment of the TCM segment, where the TCM segment includes a start identifier of the TCM segment, an end identifier of the TCM segment, configured TCM level information, and overhead information of the TCM segment; The TCM segment is a TCM segment that is not configured with a TCM segment. The TCM segment includes only the start identifier of the TCM segment and the endpoint identifier of the TCM segment.

The segment relationship between the TCM segments includes four types: segment inclusion (Nesting), segment overlap (Overlapping), segment connection (Connecting), segment separation (Isolating), and ^ port diagram 1 (a) ~ (d). among them,

Segment separation means that the endpoints of the two segments are independent, as shown in Figure 1 (a), segment A1: A2 and segment A3: The endpoints of A4 are independent.

Segment connection means that there are shared endpoints between two segments, and there is no inclusion relationship. As shown in Figure 1 (b), segment A6:A7 and segment A7:A8 share endpoint A7, and there is no inclusion relationship.

Segment overlap means that one of the two segments begins or ends with one segment, and the segment region appears intersection. At this time, according to the business direction, the previous segment and the latter segment form an overlap, in the previous segment. Referred to as the overlapped segment, the latter segment is called the overlap segment; as shown in Figure 1 (c), the segment regions of segment A3:A6 and segment A5:A7 intersect, forming segment overlap, where segment A3:A6 is The segments are overlapped, and segments A5:A7 are overlapping segments.

Segment inclusion refers to the two segments. The start and end points of one segment are included in the other segment. At this time, according to the business direction, the previous segment is called by the latter segment; as shown in Figure 1 (d), the segment is included. A5: A7 contains segment A6: A7, segment A6: A7 is the included segment, and segment A5: A7 is the containing segment.

In general, segment connection and segment separation do not affect the allocation of TCM levels; a segment can have multiple segment relationships, and all segment relationships affecting the TCM level need to be allocated.

As shown in FIG. 2, the method for processing the serial connection monitoring level of the present invention includes the following steps: Step 201: Select a service to be configured with the TCM, and obtain a route of the selected service. Here, the selected service is a service that specifies the TCM to be configured. The routing of the service refers to querying the routing information of the service according to the specified service name. The service routing information includes the service node information that the service passes through, and obtains the service routing information, which can be determined by using the service routing information. The segment relationship between TCM segments, the endpoint of the TCM segment must belong to the node through which the service passes, that is, the route of the service.

Step 202: Obtain a TCM segment on the route of the selected service. If there is an unobtained TCM segment but there is TCM configuration data, the TCM insertion point and the monitoring point are automatically generated according to the TCM configuration of the existing service. TCM segment;

Here, the acquiring the TCM segment may be to obtain all TCM segments existing on the service route, or may be a specified TCM segment, and the configured TCM segment may be obtained from the existing system, for example: The network management system (NMS) can obtain the TCM segment configured by the EMS from the element management system (EMS).

The existing service is a subnet connection. The generation of the TCM segment refers to: In the multi-level network management system environment, the lower-layer network management system does not divide the TCM segment by domain, and the upper-layer network management system automatically generates the TCM segment according to the TCM insertion point and the TCM level. Generally, the TCM insertion point and the monitoring point are paired. The TCM segment can be automatically generated on the service route, plus the TCM level and the TCM overhead. How to generate the TCM segment is the prior art. More details.

Step 203: Determine the TCM segment to be configured in the acquired TCM segment, and assign a TCM level to the TCM segment to be configured according to the segment relationship between the TCM segment to be configured and the configured TCM segment;

Here, the determining the TCM segment to be configured may be one or more TCM segments that have not been configured with a TCM level; the segment relationship is a segment connection, a segment separation, a segment inclusion, and a segment overlap; the TCM level is generally small To the big or the order from big to small.

The implementation process of the TCM level processing method will be specifically described below with reference to FIG. 3 and FIG. 4. In this embodiment, it is assumed that all TCM segments need to be configured.

Step 301: Select a work route or a protection route of an unprocessed service;

Here, the selected route refers to selecting an entire route of a service. As shown in FIG. 4, the service route includes eight service nodes: Al, A2, A3, A4, A5, A6, A7, A8; work of the selected service The route is: A1 A2 A3 A4 A5 A6 A7 A8; When a protection route is selected, it refers to a segment of the protected route from the start point to the end point of the service. As shown in Figure 5, the protection route of the selected service is: A1 A2 A3 B1 B2 B3 B4 B5 A7 A8.

Step 302: Determine the inclusion relationship between the TCM segments from one end of the service. In this embodiment, the direction is determined from the start point to the end point. Therefore, it is determined from the start end. Generally, the segment relationship between TCM segments is related to the service direction. On a one-way basis, the direction of the service is different, and the segment relationship of the TCM segment is different. Other segment information groups that contain segments or overlapping segments Under the segment information, as a list of included or overlapping segment information of the TCM segment.

Step 303: Assign a TCM level to the TCM segment of the unassigned TCM level in the order of TCM level;

Here, the allocating the TCM level is generally first assigning a level to a TCM segment that does not include or overlap other segments, and then assigning a TCM level to a TCM segment that includes or overlaps other segments, and the other segments have been assigned a TCM level, until All TCM segments are assigned a TCM level;

The TCM level order can be from small to large, and can be from large to small. For TCM segments that contain or overlap other segments, the assigned TCM level should be smaller or larger than the TCM level of the TCM segment that it contains or overlaps;

In this step, when the TCM level cannot be assigned, the current processing flow ends.

Taking Figure 4 as an example, specifically, the segment relationship between the TCM segments in Figure 4 is as shown in Table 1:

Table 1

From the starting point of the service to the direction of the service end point, the direction from A1 to A8 in this embodiment is not A TCM segment assigned a TCM level is assigned a TCM level. This is a loop operation, each time the assigned object is a TCM segment whose segment relationship is segment separation, or segment connection; or a TCM segment that contains or overlaps other segments, and the other segments have been assigned a TCM level. The first time you find a TCM segment that is not included or overlapped, that is, the segment relationship is a TCM segment with segment separation or segment connection, such as: A1 : A2, A3: A4, A6: A7, A7: A8. In this embodiment, it is assumed that allocation is performed in order of small to large TCM levels.

The results after the first processing are shown in Table 2:

Table 2

After the TCM segments that are not included or overlapped are allocated, the TCM segments that contain or overlap other segments and the other segments have been assigned TCM levels are allocated, such as: A3: A6, A5: A7. Since A3: A6 includes TCM segment A3: A4 has been assigned TCM level, and TCM level is 1, the TCM level of A3:A6 must be greater than 1. Similarly, A5: A7 includes TCM segment A6:A7 The overlapping TCM segments A3:A6 have been assigned TCM level, and the TCM levels are 1, 2, so the TCM level of A5:A7 must be greater than 2. The results after the second treatment are shown in Table 3:

TCM segment contains segment relationship TCM level

A1 : A2 no segmentation 1

A3: A4 no segmentation 1

A6: A7 No segment connection 1

A7: A8 No segment connection 1

A3: A6 A3: A4 paragraph contains 2

A5: A7 A6: A7 paragraph contains 3

A3: A6 paragraph overlap

A1 : A8 A1 : A2 segment contains unallocated

A3: A4 segment contains

A6: A7 segment contains

A7: A8 segment contains

A3: A6 paragraph contains

A5: A7 segment contains

table 3

The same principle continues to be allocated. The results after the third processing are shown in Table 4:

TCM segment contains segment relationship TCM level

A1 : A2 no segmentation 1

A3: A4 no segmentation 1

A6: A7 No segment connection 1

A7: A8 No segment connection 1

A3: A6 A3: A4 paragraph contains 2

A5: A7 A6: A7 paragraph contains 3

A3: A6 paragraph overlap

A1 : A8 A1 : A2 segment contains 4

A3: A4 segment contains A6: A7 segment contains

A7: A8 segment contains

A3: A6 paragraph contains

A5: A7 segment contains

Table 4

In this embodiment, all the TCM segments are required to be configured, that is, no TCM level has been used. In actual applications, if the TCM level is allocated before the TCM level is allocated for the TCM segment to be configured, then, Before the step 303, the method further includes: calculating the available TCM level according to the existing TCM configuration of the service; correspondingly, the allocating the TCM level to the TCM segment to be configured is specifically: assigning the calculated available TCM level to the required configuration TCM segment. For example, according to the existing TCM configuration of the service, the available TCM level is 3-6, and the TCM level allocated to the TCM segment to be configured is between 3-6, where the service may be a sub- Network connection.

Step 304: Record an assignable range of each TCM segment;

Here, the assignable range means that the current TCM segment is from the currently assigned TCM level to 6, for example: A1: A2, A3: A4, A6: A7, A7: A8 has an assignable range of: 1-6; A3: A6 The assignable range is: 2-6; A5: The assignable range of A7 is: 3-6; A1: The assignable range of A8 is: 4-6.

Step 305: Determine whether all routes are processed. If yes, go to step 306; otherwise, go to step 301;

When processing a protected route, only the TCM segments that have been assigned a TCM level will be recorded for their assignable range.

Step 306: Determine whether there is a protection route, if yes, execute step 307; otherwise, end the current processing flow;

Here, the protection route is identified by the routing information of the service.

Step 307: For the TCM segment that exists in both the working route and the protection route, take the intersection of the TCM level assignable range and adjust the TCM level assigned to the corresponding TCM segment. Referring to FIG. 4 and FIG. 5, wherein the A1:A8 segments are both work route and protection route, but the workable route and the protection route have different assignable ranges. Under the work route, the TCM segment A1:A8 has an assignable range of 4 -6; Under the protection route, the assignable range of TCM segment A1:A8 is 3-6; then, the intersection of the two is combined, and finally the assignable range is adjusted to: 4-6.

The service involved in Figure 4 is a two-way service, but it is handled in a one-way manner when the TCM level is actually allocated. Process one direction first, then another direction. From A1, the segment relationship between TCM segments is obtained. For the segment overlap relationship, which TCM segment starts at the front, it is overlapped, and the other TCM segment overlaps other segments. For example: A5: A7 overlaps A3:A6.

FIG. 5 is a schematic diagram of the implementation principle of the TCM segment when the service is protected. As shown in the figure, the service has a protection route B1 to B5 between the service nodes A3 and A7. Due to the appearance of B1 to B5, when the service is switched, the actual TCM route will be the service route through B1 to B5. Since the TCM segment A1:A8 spans B1 to B5, the TCM segment A1:A8 is allocated at the TCM level. It is also necessary to consider the allocation of TCM levels in the routes from B1 to B5, and take the intersection of the working route TCM level allocation range and the protection routing TCM level allocation range.

As shown in Figure 5, specifically, the segment relationship between the TCM segments in Figure 5 is as shown in Table 5, including the TCM segment on the working route and the TCM segment on the protection route:

TCM segment contains segment relationship

A1 : A2 without segmentation

A3: A4 no segmentation

A6: A7 No segment connection

A7: A8 no segment connection

A3: A6 A3: A4 paragraph contains

A5: A7 A6: A7 paragraph contains

A3: A6 paragraph overlap

B1 : B3 no segment connection

B3: B4 no segment connection B3: B5 B3: B4 segment contains

A1 : A8 A1 : A2 segment contains

A3: A4 segment contains

A6: A7 segment contains

A7: A8 segment contains

A3: A6 paragraph contains

A5: A7 segment contains

B1: B3 segment contains

B3: Section B4 contains

B3: B5 segment contains

table 5

When the service is switched, the actual TCM route is protected by B1 to B5. The segment relationship between the TCM segments on the protected route is as shown in Table 6:

Table 6

The results after the first processing are shown in Table 7:

TCM segment contains segment relationship TCM level A1: A2 no segmentation 1 (unchanged, independent of the protection link)

B1: B3 No segment connection 1

B3: B4 No paragraph contains 1

B3: B5 B3: B4 segment contains unallocated

A7: A8 No segment connection 1 (unchanged, independent of the protection link)

A1: A8 A1: A2 1 Unallocated

B1: B3 1

B3: B4 1

B3: B5 is not assigned

A7: A8 1

Table 7

The results after the second treatment are shown in Table 8:

Table 8 The results after the third treatment are shown in Table 9:

Table 9

When assigning the TCM level in the case of protection routing, only the TCM level of the TCM segment of the working route affected by the TCM level is adjusted, such as A1:A8. Integrated protection and no protection, cross-protection TCM segment A1: A8 can be set to a TCM level of 4 and an assignable range of 4-6.

In order to implement the foregoing method, the present invention further provides a TCM level processing apparatus, including: a service route obtaining module, a TCM segment determining module, and a TCM level allocating module;

The TCM level allocation module is configured to allocate a TCM level for the TCM segment to be configured according to a segment relationship between the TCM segment to be configured and the configured TCM segment. Here, the routing of the service includes: a working route and a protection route; when applied in the ASON network, the preset recovery route is further included; the segment relationship is: segment inclusion, segment overlap, segment connection, segment separation; Levels range from small to large, or from large to small.

Further, the apparatus further includes a storage module for recording an assignable range of each TCM segment.

Further, the device further includes a judging module, configured to determine whether all the routes are processed; determining whether there is a protection route; correspondingly, the TCM level allocation module, when there is no protection route, is configured to be configured on the working route The TCM level of the TCM segment; when there is a protection route, the TCM level of the TCM segment to be configured on the working route and the protection route is allocated.

Further, the device further includes a TCM level adjustment module, configured to adjust a TCM level assignable of the corresponding TCM segment according to an intersection of a working route TCM level allocation range and a protection route TCM level allocation range when the service has a working route and a protection route. range.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included. Within the scope of protection of the present invention.

Claims

Claim

A method of processing a tandem connection monitoring (TCM) level, the method comprising:

The TCM level processing method according to claim 1, wherein the route for obtaining the service to be configured with the TCM is: specifying a name of a service to be configured with the TCM; and querying routing information of the service according to the specified service name.

The TCM level processing method according to claim 1, wherein after the TCM segment on the service route is obtained, the TCM segment to be configured is determined; the method further includes: the TCM segment that is not acquired but has the TCM When the configured data is generated, the TCM segment between the insertion point and the monitoring point of the TCM is automatically generated according to the TCM configuration of the existing service.

The TCM level processing method according to claim 1, 2 or 3, wherein the assigning the TCM level to the TCM segment to be configured includes: first assigning a level to the TCM segment that does not include or overlap other segments in the TCM level order. And assign a TCM level to the TCM segment that contains or overlaps other segments, and the other segments have been assigned a TCM level, until all TCM segments are assigned a TCM level.

The TCM level processing method according to claim 4, wherein before the TCM level is allocated for the TCM segment to be configured, the method further comprises: calculating an available TCM level according to the existing TCM configuration of the service;

Correspondingly, the allocating the TCM level for the TCM segment to be configured further includes: assigning the calculated available TCM level to the TCM segment to be configured.

The TCM level processing method according to claim 4, wherein after the TCM level is allocated for the TCM segment to be configured, the method further comprises: recording each TCM segment The assignable range.

The TCM level processing method according to claim 4, wherein the method further comprises: determining that a TCM segment that exists in both the working route and the protection route exists in a TCM level assignable range when the protection route exists Intersection, adjusting the TCM level assigned to the corresponding TCM segment.

The TCM level processing method according to claim 1, wherein the service route is a work route, a protection route, and a preset recovery route.

The TCM level processing method according to claim 1, wherein the segment relationship is a segment inclusion, a segment overlap, a segment connection, and a segment separation.

A serial connection monitoring TCM level processing device, the device comprising: a service route acquisition module, a TCM segment determination module, and a TCM level allocation module;

11. The TCM level processing apparatus according to claim 10, wherein the apparatus further comprises a storage module for recording an assignable range of each TCM segment.

12. The TCM level processing apparatus according to claim 10, wherein the apparatus further comprises a determining module, configured to determine whether all routes are processed; and determining whether a protection route exists.

The TCM level processing device according to claim 10, 11 or 12, further comprising a TCM level adjustment module, configured to allocate a range according to a working route TCM level when there is a work route and a protection route in the service. And the intersection of the protection route TCM level allocation range, and adjust the TCM level assignable range of the corresponding TCM segment.

The TCM level processing apparatus according to claim 10, wherein the service route is a work route, a protection route, and a preset recovery route.

The TCM level processing apparatus according to claim 10, wherein the segment relationship is segment inclusion, segment overlap, segment connection, and segment separation.